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What options are available for Ultraviolet (UV) applications?
Last Updated: 06/14/2013
Standard glass absorbs ultraviolet light below 400nm. UV cameras require a CCD with no coverglass, and possibly no microlenses plus a fused silica chamber cover window.  UV configurations of the QSI RS Series cameras are available.  Please contact QSI Sales to discuss your requirements.

In general the interline transfer sensors in the QSI RS 2.0 (KAI-2020) and QSI RS 4.2 (KAI-04022), and the full-frame KAF-3200 in the QSI RS 3.2 offer the best sensitivity for UV applications.  Spectral response of the 2.0mp KAI-2020 and the 4.2mp KAI-04022 is identical.


240nm to 300nmThe KAI-2020 (QSI RS 2.0) and KAI-04022 (QSI RS 4.2) without microlenses offer the highest QE from 240nm to 300nm. QE rises from 3% to 6% across this range rising to 9% at 470nm.
Above 310nm
The KAF-3200 with microlenses offers the highest QE at 310nm and above.  QE of the KAF-3200 is 10% at 310nm, 5% at 300nm, less than 1% at 290nm. 
QE of the KAI-2020 and KAI-04022 with microlenses are higher than the no microlens version above 320nm.

QSI camera models configured for UV applications include a fused silica window for maximum transmission of UV light. Various anti-reflection coatings are available on the fused silica window optimized for different applications. See the graph below:

Anti-reflection coatings

  • The UV-VIS coating is recommended for most UV applications. It offers excellent light transmission from 240nm to 700nm with reflectance of less than 1% across much of that range.
  • The UV coating is the best choice for imaging between 240nm and 450nm with reflectance less than 0.5% from 240nm to 440nm. Above 450nm, the UV-VIS coating has superior transmission.

When ordering a camera with the UV option, please select which coating you would like on the fused silica chamber cover window.  Please also review the sensor datasheet for the model you're considering to determine if the microlens or no-microlens version of the sensor is best for your application.  Links to the sensor datasheets can be found on the Specification page for each QSI camera model. 

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